Collision processes at the northern margin of the Black Sea

摘要: Extended along the Crimea–Caucasus coast of Black Sea, Crimean Seismic Zone (CSZ) is an evidence active tectonic processes at junction Scythian Plate and Sea Microplate. A relocation procedure applied to weak earthquakes (mb ≤ 3) recorded by ten local stations during 1970–2013 helped determine more accurately parameters hypocenters in CSZ. The Kerch–Taman, Sudak, Yuzhnoberezhnaya (South Coast), Sevastopol subzones have also been recognized. Generalization focal mechanisms 31 strong 1927–2013 has demonstrated predominance reverse reverse–normal-faulting deformation regimes. This ongoing process occurs under settings compression transpression. earthquake foci with strike-slip component concentrate west Comparison modes western eastern Mountains according tectonophysical data that part dominated normal- faulting, while part, reverse-fault regimes prevail. seismicity gravity field suggests underthusting East Microplate thin suboceanic crust Plate. In Subzone, this complicated frontal wedging into marginal crust. indentation mechanism explains anomaly their uplift.